Improve filtering for values that are surely not paths

bitsandbytes/diagnostics/cuda.py

@@ -45,11 +45,16 @@ def find_cuda_libraries_in_path_list(paths_list_candidate: str) -> Iterable[Path
  for dir_string in paths_list_candidate.split(os.pathsep):
  if not dir_string:
  continue
+ if os.sep not in dir_string:
+ continue
  try:
  dir = Path(dir_string)
- if not dir.exists():
- logger.warning(f"The directory listed in your path is found to be non-existent: {dir}")
- continue
+ try:
+ if not dir.exists():
+ logger.warning(f"The directory listed in your path is found to be non-existent: {dir}")
+ continue
+ except OSError: # Assume an esoteric error trying to poke at the directory
+ pass
  for lib_pattern in CUDA_RUNTIME_LIB_PATTERNS:
  for pth in dir.glob(lib_pattern):
  if pth.is_file():
@@ -65,6 +70,7 @@ def is_relevant_candidate_env_var(env_var: str, value: str) -> bool:
  os.sep in value # might contain a path
  and "CONDA" not in env_var # not another conda envvar
  and env_var not in CUDART_PATH_IGNORED_ENVVARS # not ignored
+ and "\n" not in env_var # likely e.g. a script or something?
  )
  )